11420440443 has 6 divisors (see below), whose sum is σ = 16496191764. Its totient is φ = 7613626956.

The previous prime is 11420440441. The next prime is 11420440483. The reversal of 11420440443 is 34404402411.

11420440443 is a `hidden beast` number, since 1 + 14 + 204 + 4 + 0 + 443 = 666.

It is not a de Polignac number, because 11420440443 - 2¹ = 11420440441 is a prime.

It is a super-2 number, since 2×11420440443² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11420440441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 634468905 + ... + 634468922.

It is an arithmetic number, because the mean of its divisors is an integer number (2749365294).

Almost surely, 2^11420440443 is an apocalyptic number.

11420440443 is a deficient number, since it is larger than the sum of its proper divisors (5075751321).

11420440443 is a wasteful number, since it uses less digits than its factorization.

11420440443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268937833 (or 1268937830 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 11420440443 its reverse (34404402411), we get a palindrome (45824842854).

The spelling of 11420440443 in words is "eleven billion, four hundred twenty million, four hundred forty thousand, four hundred forty-three".